US3081750A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of controlling a forced-circulation boiler operating at supercritical pressure
Assignee: Sulzer AG
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Filing: 1959-03-10
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Granted: 1963-03-19
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Expires: 1979-03-10
Abstract
No abstract record available.
Inventors
- 👤 Profos Paul
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 23:16
CPC Classifications
F; F22; F22B; F22B35/00; F22B35/06; F22B35/10; F22B35/12; F22D; F22D5/00; F22D5/26; F22D5/30
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
169 words
IN THE OPERATION OF A ONCE-THROUGH FORCED-CIRCULATION BOILER EMPLOYING WATER AS THE WORKING SUBSTANCE THEREIN AND OPERATING AT SUPERCRITICAL PRESSURE, SAID BOILER BEING CONTROLLED BY ADJUSTMENT OF FEEDWATER INPUT IN RESPONSE TO RATE OF STEAM FLOW AND STEAM TEMPERATURE MEASUREMENTS, THE METHOD WHICH COMPRISES MEASURING THE RATE OF STEAM FLOW AT A POINT IN THE FLOW PATH OF THE WORKING SUBSTANCE THROUGH THE BOILER WHERE THE HEAT CONTENT OF THE STEAM LIES BETWEEN 400 AND 600 KILOGRAM CALORIES PER KILOGRAM, MEASURING THE TEMPERATURE OF THE STEAM AT A POINT IN THE FLOW PATH OF THE WORKING SUBSTANCE THROUGH THE BOILER WHERE THE CONDITION OF THE STEAM, AS REPRESENTED ON THE TEMPERATURE-HEAT CONTENT DIAGRAM FOR WATER, LIES WITHIN AN AREA BOUNDED BY ISOBARS OF 220 AND 400 ATMOSPHERES ABSOLUTE AND BY ISOGRADIENTS OF THESE ISOBARS OF 30* C./100 KG. CAL./KG. AND 100* C./100 KG. CAL./KG., AND VARYING THE RATE OF FEEDWATER INPUT TO SAID BOILER AS A DIRECT FUNCTION OF SAID MEASURED TEMPERATURE AND OF SAID RATE OF STEAM FLOW.
Claim 2
Dependent Claim
169 words
IN THE OPERATION OF A ONCE-THROUGH FORCED-CIRCULATION BOILER EMPLOYING WATER AS THE WORKING SUBSTANCE THEREIN AND OPERATING AT SUPERCRITICAL PRESSURE, SAID BOILER BEING CONTROLLED BY ADJUSTMENT OF FEEDWATER INPUT IN RESPONSE TO RATE OF STEAM FLOW AND STEAM TEMPERATURE MEASUREMENTS, THE METHOD WHICH COMPRISES MEASURING THE RATE OF STEAM FLOW AT A POINT IN THE FLOW PATH OF THE WORKING SUBSTANCE THROUGH THE BOILER WHERE THE HEAT CONTENT OF THE STEAM LIES BETWEEN 400 AND 600 KILOGRAM CALORIES PER KILOGRAM, MEASURING THE TEMPERATURE OF THE STEAM AT A POINT IN THE FLOW PATH OF THE WORKING SUBSTANCE THROUGH THE BOILER WHERE THE CONDITION OF THE STEAM, AS REPRESENTED ON THE TEMPERATURE-HEAT CONTENT DIAGRAM FOR WATER, LIES WITHIN AN AREA BOUNDED BY ISOBARS OF 220 AND 400 ATMOSPHERES ABSOLUTE AND BY ISOGRADIENTS OF THESE ISOBARS OF 30* C./100 KG. CAL./KG. AND 100* C./100 KG. CAL./KG., AND VARYING THE RATE OF FEEDWATER INPUT TO SAID BOILER AS A DIRECT FUNCTION OF SAID MEASURED TEMPERATURE AND OF SAID RATE OF STEAM FLOW.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1966-03-18 | 1966-09-17 | 1967-03-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-03-18 | 1970-09-17 | 1971-03-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-03-18 | 1974-09-17 | 1975-03-19 | $7700.00 | Window Closed / Lapsed |